How To Write A Proposal For Painting Job . Free painting proposal template | corkcrm. Estimate a single room by going off of a. Bid Proposal Template 17+ Free Sample, Example, Format Download from www.template.net When purchased, the complete sample is 5 pages long and is written using these proposal pack chapters: Use this sample painting proposal letter as a template for your formal proposal letter. Estimate each room, one at a time.